CN1672513A

CN1672513A - Plant growth regulator

Info

Publication number: CN1672513A
Application number: CN 200410039864
Authority: CN
Inventors: 丁家启; 高剑波; 付正洪
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-03-24
Filing date: 2004-03-24
Publication date: 2005-09-28
Anticipated expiration: 2024-03-24
Also published as: CN100441095C

Abstract

The plant growth regulator for breeding rice hybrid consists of methoxone sodium 40-60 wt%, 2, 4-D 5-10 wt%, aspirin 5-30 wt% and starch 5-10 wt% mixed together. Into the plant growth regulator, triazolone in 35-40 wt% may be also added. The plant growth regulator has the functions of promoting the elongation of section below the ear of the sterile line, improving plant structure and ear structure, promoting the sterile line to bloom concentratively, raising the blooming period, etc. and thus can save the consumption of gibberellin, raise the hybrid bearing rate and increase hybrid yield.

Description

One plant growth regulators

Technical field

The present invention relates to a plant growth regulators, be applicable to hybrid rice breeding, production of hybrid seeds growth regulating.

Background technology

Bad different friendship habits such as general plant is short because the heredity of its inherence and physilogical characteristics exist, the bag neck is heavy for hybrid rice breeding, production of hybrid seeds male sterile line, the slow and fragmentary dispersion of blooming, very unfavorable to outcrossing.At present, the approach that solves this each and every one problem mainly is to adopt the external source gibberellin treatment.Gibberellin mainly is by promoting cell elongation and cell division to promote the elongation of rice strain stipes and leaf sheath.Along with the raising of gibberellin consumption and the improvement of operation technique, for alleviating male sterile line bag neck, flower position when regulating flower, improving stigma exposing ratio, improve solid and important function has been brought into play in the output aspect.But use the contradiction that neck and plant height are wrapped in the often difficult coordination of gibberellin, the gibberellin consumption is increased to a certain degree, when promoting the top internode elongation, alleviating the bag neck, the bottom internode is also had corresponding elongation, thereby makes plant high and easy.Both be unfavorable for the male parent pollination, because nutriment is consumed on the cane, be unfavorable for the raising of ripening rate and thousand kernel weight again.The gibberellin consumption is excessive, also can bring side effects such as the fringe germination increases the weight of, offspring's rice shoot is strong, and strengthen breeding cost, has influenced the raising of production of hybrid seeds benefit.

At the above-mentioned deficiency of gibberellin, domestic many units have carried out the research of chemical regulation preparation.Use at present wider having " Hua Tiaoling ", " spirit spent in quick-acting accent ", " No. one, hole section ", " treasured spent in accent " etc., the application of these medicaments has obtained certain effect of increasing production, and particularly effect is comparatively remarkable under gibberellin consumption situation on the low side.But generally based on nutritional agents, and contain a certain proportion of gibberellin mostly in these medicaments, on the function during, for the releasing of male sterile line bag neck and moulding of plant type often failed to break through the effectiveness scope of gibberellin based on male sterile line flower ahead of time.

Summary of the invention

The present invention seeks at above-mentioned existing problems, outside gibberellin and some nutritional agentss commonly used, provide a kind of inexpensive chemical substance newly to fill a prescription, be used for the hybrid rice crossbreeding, can more thorough releasing male sterile line bag neck, improve the different friendship performance of male sterile line, and can mould desirable different friendship plant type, realize increasing substantially of outcrossing seed-setting rate and hybrid seed yield level.

Plant growth regulator of the present invention mainly is that 4-drips by 40-60% methoxone (sodium), 5-10%2, the starch of 5-30% aspirin and 5-10% is mixed forms.The triazolone that also can add 35-40% therein.

In the used above-mentioned medicament of the present invention, methoxone (sodium) is a steroids, is used for the crossbreeding rice male sterile line, can significantly promote young tender internode elongation under the fringe, removes the bag neck fast, stimulates stigma appearing.But improper as usage, what then can cause male sterile line grain husk flower does not close clever phenomenon.2, the 4-effect of dripping is close with methoxone, but its price is more expensive.

Materials such as the salicylic acid of aspirin and acetic acid can be protected male sterile line blade and not dehydration of floral organ branch effectively, thereby satisfy the needs of yielding positive results, and can strengthen photosynthesis, prolong the male sterile line vitality of stigma.

Triazolone can be used for preventing and treating rice kernel smut and other foliage disease, can also delay the functional leaf early ageing in hybrid rice later stage, strengthens leaf photosynthesis, improves ripening rate and thousand kernel weight.

Starch mainly is to use as filler.

The present invention will be applied to have following beneficial effect on the crossbreeding rice male sterile line by the above-mentioned substance plant growth regulator (inventor's called after " the AB type increases granula ") that forms that is mixed:

(1), promote elongation fast between uncertain meropodium under the male sterile line fringe, remove male sterile line bag neck rapidly, increase fringe grain exposing ratio.According to 20 experimental tests in domestic more than ten counties (city), identical or reduce under the situation of 15-20% at the gibberellin consumption, using the present invention, to handle average packet neck granule rate be 1.45%, reduced 4.11 percentage points than single with the gibberellin contrast.

(2), the internode that can regulate plant effectively forms, and can not only promote the elongation of high-order internode (fringe is joint, two joints that fall down), and can control the elongation of low level (three joints that fall are following) internode, improves the height joint position ratio of plant.Measure according to the Shanyou 63 seed farm, be all at the gibberellin consumption under the situation of 12g, use preparation of the present invention and handle, its panicle neck and two internodes that fall have improved 6.9cm and 1.2cm than untreated control respectively, and three internodes that fall are then compared according to low 6cm.Height joint position under the close situation of plant height, has improved 0.86 than being 2.41.After using preparation of the present invention, drape over one's shoulders under the male sterile line blade is obvious, the fringe layer is on the leaf layer, and the fringe layer is loose, fringe shape is loose, helps accepting paternal pollen, improves the pollen availability.

(3), promote heading flowering period to concentrate in advance, when spending ahead of time.After using preparation of the present invention, the male sterile line heading is concentrated, and it is fast and neat to go out fringe, also corresponding 1-2 days in advance of full heading time, and whole heading flowering period shortens 2-3 days.This can make the flower of female parent phase concentrate on male parent relatively and contain the flower scope, gives full play to the solid potentiality of tillering tassel.Simultaneously, because pollination grouting is concentrated relatively, and avoided because of being in the milk the ripe inconsistent loss that causes, the generation that favourable minimizing field fringe germinates.Observe to find, use this preparation after, day flowering time and the peak of blooming are all compared according to 20-30 minute ahead of time, flower ratio contrast at morning is general to improve 10-15 percentage point, and opens a clever angle and increase, it is solid to help inseminating.

(4), improve stigma exposing ratio, prolongation vitality of stigma.According to application result in, the excellent combination of association excellent at Shan, use the present invention after, stigma exposing ratio has on average improved 36.9% (luffing 5.1-88%), and the bilateral ratio that exposes also greatly increases.According to observations, use the present invention and handle, bloom and exposed column cap on the 6th day and still have 13.6% ripening rate, and contrast has only 5.42%.

(5), improve outcrossing seed-setting rate and and hybrid seed yield.Be applied to the result according to 20 points in domestic more than ten counties (city), on average improve outcrossing seed-setting rate 26.9% (luffing 14.6-53.8%), increase hybrid seed yield 24.8% (luffing 8.7-58.2%).

(6), cost-saving synergistic.Use the present invention, comparable normal condition reduces gibberellin consumption 15-20%, and the cost of being saved and this medicament expense are suitable substantially, thus have flower less, the characteristics of instant effect, high efficiency.

Embodiment

Technological process of the present invention is simplified, and is easy and simple to handle, only need take by weighing according to quantity, extremely easy to use.

Embodiment one: be made up of A agent, B agent two parts.Contain methoxone, 2 in the A agent, 4-drips, starch; Contain aspirin in the B agent.Its content (weight %) is:

Methoxone sodium 50-55%

2,4-drips 5-10%

Aspirin 28-32%

Starch 5-10%

During use, the A agent should be broken up initial use of seven phases to eight in the male sterile line fringe.The B agent should be eared to full heading time at male sterile line and be used.Each every 667m ²To water 20-25kg spraying, only spray is maternal, does not spray male parent.Every 667m ²Total consumption (containing A, B agent) 65g.

Embodiment two: be made up of methoxone sodium, aspirin, triazolone and starch.Its content (weight %) is:

Methoxone sodium 45-50%

Aspirin 5-10%

Triazolone 35-40%

Starch 5-10%

Service time should be at seven beginnings phase to eight of male sterile line ear differentiation, every 667m ²Consumption 65g.During use, water 20-25Kg is broken up initial even spraying of seven phases to eight in the male sterile line fringe.

Claims

1. plant growth regulator that is applied to hybrid rice breeding, the production of hybrid seeds.It is characterized in that containing 40-60% methoxone (sodium), 5-10% 2,4-drips, the starch of 5-30% aspirin and 5-10%.

2. by the described plant growth regulator of claim 1, it is characterized in that also containing the triazolone of 35-40%.

3. by the described plant growth regulator of claim 1, it is characterized in that content (weight %) is: methoxone sodium 50-55%; 2,4-drips 5-10%; Aspirin 28-32%; Starch 5-10%.

4. by the described plant growth regulator of claim 2, it is characterized in that content (weight %) is: methoxone sodium 45-50%; Aspirin 5-10%; Triazolone 35-40%; Starch 5-10%.